Rubber-forcing machine



J. W. GOMERSALL. RUBBER FORCING MACHINE. APPLICATION FILED NOV. 1, 1920.

Patented J uly H, 1922.

PAT

'RUBBER-FORCING MACHINE.

Specification of Letters Patent.

Patented July it, 1922..

Application filed November 1, 1920. Serial No. 421,153.

(Gasman mnnnn Tnn rnovrsrons or THE ACT or marten s, 1921, 41 STAT. I.., 1313:

T0 all'whom it may concern:

Be it known that 1, JOHN WILLIAM GoM- ERSALL, subject of the King of'Great Britain and Ireland, and resident of Manchester, in the county of Lancaster, England, have invented certain Improvements in Rubber- Forcing Machines (for which I have filed an application in Great Britain on May 30, 1918, which issued as Patent No. 150,7 54 on Sept. 16, 1920), of which the following is a specification.

This invention relates to improvements in rubber forcing machines and has particular reference to impfoved means for feeding the rubber material to the forcing screw or scroll.

Prior to the date of m invention the rubber material has been ed tothe screw or scroll in two ways. In the first case the material is pressed by a stick into a small hopper or throat-opening, communicating with the scrollchamber, a fair amount of pressure requiring to be exerted to cause the rubber to become engaged and to be forced forward by the scroll. Hence strong girls or youths are required for the purpose. In

the second case, later developments took the form of a pair of positively-driven adjustable feed rollers located on the machinev framing above the throat opening and scroll. Such latter arrangement is an expensive construction and has the additional disadvantage that when it is desired to run the forcing machine for short periods ondifi'erent col-' ours of rubber material itis very diflicult to clean out the throat and attendant parts after each colour before commencing with the next.

My invention is designed to provide a novel roller feeding arrangement and a removable doctor mechanism designed to avoid the defects referred to.

My invention will be fully described with reference to the accompanying drawing in which,

Fig. 1. is a sectional plan of so much of a rubber-forcing machine of known construc-' tion as-is necessary to show the character of I mgrinvention and ig. 2. side elevation and Fig. 3. sectional end elevation of'same on 1ine.1 2 of Fig. 1.

With the aforesald end in view I re-arrange the throat a leading to the scroll chant ber Z) and constitute one side of it by a feed roller 0 fixed upon or formed integral with a shaft d. The latter is supported in bearing bloc'kse having fitting strips f engaging with grooves formed in the casing or frame 9 of the forcing machine, the sides h of the blocks fitting in open gaps i in said frame. The bearing blocks are held in position against the shaft b caps j secured and ad-.

justed by studs an nuts 7c. The shaft has formed in one with it a driving wheel m, adapted to gear with a wheel a formed mom with or'secured to the usual scroll 0 to enable the roller 0 to be driven positively. The roller 0 acts inconjunction with the scroll 0 to form. a feed mechanism. It is mounted so that its periphery is a little distance away from thescroll, so leaving a' passage p for the rubber material. The roller 0 is prefer; ably driven at a peripheral speed a little in excess of that of the scroll 0 so as to exert a pulling action upon the material and effectively feed it to the scroll. The face 9 of the throat opposite to the roller may be vertical or partly vertical or inclined as shown to form with the roller 0 a suitable entrance opening or throat a. The roller 0 may be adapted to be adjusted horizontally to and from the scroll 0 to decrease or increase the space between them, if required.

In conjunction with the roller 0 I employ an adjustable and removable doctor 1' for cleaning the roller 0 of adherent rubber as it rotates. This doctor is located in a space .9 below and at the inner side of the roller 0, its inner face tbeing tangential to the scroll. It is carried on a support a. extending to the outside of the machine frame a. This support terminates in a screw w fitted with a wing or other nut w and between the latter and a fixed abutment y is located a spring 2 which can be adjusted by the nut to always draw the doctor to the roller 0 apart from the pressure exerted by the'rubber material being fed into the machine the screw or passing freely through the hole 3 in the abutment 3/ which forms art of the plate afterwards referred to. .ertically the doctor is supported by a removable plate 4 carried at the bottom of the space p. The plate 4 is held in position on the frame o by screwed studs. 5 and nuts 6 and a guide pin 7. By removing plate 4 first the doctor 1' can be taken away from the .roller 0 and ample room be left for cleaning the space beneath roller, a shaft supporting said roller having the roller; p a driving wheel forming part of said shaft, What I claim as m invention and desire bearing blocks for the shaft supported and to secure by Letters atent is guided in gapped openings of the machine 15 5 1. In a rubber-forcing machine, the comframe and removable caps for the bearings. bination with the single roller of a doctor In testimony whereof I have hereunto set located below it and adaptedto be automatimy hand in the resence of two witnesses. cally drawn towards the periphery of the JOHN WILLIAM GOMERSALL. roller by a spring, and a-spring op'eratively Witnesses: 10 connected with the said doctor. WILLIAM W. TAYLOR,

2. In a rubber forcing machine, a'feed HENRY CRUsn. 

